CVE-2026-40139

CRITICAL

BeyondTrust Remote Support - Unauthenticated Access Control Bypass

Title source: manual

Description

A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authentication requests may allow an unauthenticated remote attacker to bypass access controls and gain unauthorized access to the appliance, including accounts with elevated privileges. Exploitation requires a specific authentication configuration to be enabled.

References (1)

Core 1

Core References

https://www.beyondtrust.com/trust-center/security-advisories/bt26-03

Scores

CVSS v3 9.8

EPSS 0.0067

EPSS Percentile 48.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-287

Status published

Products (8)

BeyondTrust/Privileged Remote Access < 25.3.2

BeyondTrust/Privileged Remote Access < 25.3.3

BeyondTrust/Privileged Remote Access < 26.2.1

beyondtrust/privileged_remote_access < 25.3.3

BeyondTrust/Remote Support < 25.3.2

BeyondTrust/Remote Support < 25.3.3

BeyondTrust/Remote Support < 26.2.1

beyondtrust/remote_support < 25.3.3

Published Jul 06, 2026

Tracked Since Jul 06, 2026